WM3900HWA Error Codes — LG Washing Machine
🏷️ Model: WM3900HWA 📅 Production: 2019–2022 🫧 Type: Washing Machine
4.5 cu ft TurboWash 360 front-loader, one of LG's most-reviewed washers. Direct-drive motor; drain and inlet codes are the most common.
Most Common Codes on the WM3900HWA
OE IE UE LE dE AE
Drainage error — water not draining within expected time
⚠ High Severity Water inlet error — water not filling within expected time
⚠ Medium Severity Unbalanced load — cannot complete spin cycle
✓ Low Severity Motor locked — hall sensor or stator fault
⚠ High Severity Door open or door lock failure
⚠ Medium Severity Leak detected (Aqua error) — water sensed in the base pan
🛑 Critical — Stop Using All Other LG Washing Machine Codes
The WM3900HWA can also display any of the standard LG washing machine codes:
tCL Tub clean reminder — drum needs cleaning FE Water overflow error — drum overfilling HE Heater error — water heater circuit fault UB Unbalanced load — washer cannot distribute the load for spin SUD Excess suds detected — too much foam in the tub CD Cool Down — washer-dryer combo lowering tub temperature (not a fault) CE Over-current error — motor drawing too much current SE Hall sensor error — motor speed sensor fault PE Water level pressure sensor error EE EEPROM error — control board memory failure E6 Clutch motor error (top-load models) bE Button error — control panel key stuck nE Noise sensor error (front-load models) tE Thermistor error — water temperature sensor reading out of range F6 Overcurrent error — excessive current detected in the motor drive circuit CL Child lock active — controls are locked, not an error dHE Dry heater error — drying heater fault (washer-dryer combo models) PF Power failure — the cycle was interrupted by a loss of power
💡 Tip: Your model's serial sticker (door frame, rim, or back panel) confirms the exact
model number. Codes can differ between revisions of the same model line — if a code on your display
isn't listed here, check the
full LG washing machine code list.